AU672728B2 - Box constituting vacuum insulated walls of a refrigerator or freezer cabinet - Google Patents

Box constituting vacuum insulated walls of a refrigerator or freezer cabinet Download PDF

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Publication number
AU672728B2
AU672728B2 AU79019/94A AU7901994A AU672728B2 AU 672728 B2 AU672728 B2 AU 672728B2 AU 79019/94 A AU79019/94 A AU 79019/94A AU 7901994 A AU7901994 A AU 7901994A AU 672728 B2 AU672728 B2 AU 672728B2
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AU
Australia
Prior art keywords
box
refrigerator
planar surfaces
shells
walls
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
AU79019/94A
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AU7901994A (en
Inventor
Fredrik Dellby
Per-Ake Fonser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Electrolux AB
Original Assignee
Electrolux AB
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Filing date
Publication date
Application filed by Electrolux AB filed Critical Electrolux AB
Publication of AU7901994A publication Critical patent/AU7901994A/en
Application granted granted Critical
Publication of AU672728B2 publication Critical patent/AU672728B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00General constructional features
    • F25D23/06Walls
    • F25D23/062Walls defining a cabinet
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2201/00Insulation
    • F25D2201/10Insulation with respect to heat
    • F25D2201/14Insulation with respect to heat using subatmospheric pressure

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Refrigerator Housings (AREA)

Description

B'
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AUSTRALIA
PATENTS ACT 1990 COMPLETE SPECIFICATION NAME OF APPLICANT(S): Aktlebolaget Electrolux ADDRESS FOR SERVICE: scee C. qeetS sq..
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C 5*4 eq DAVIES COLLISON CAVE Patent Attorneys 1 Little Collins Street, Melbourne, 3000.
INVENTION TITLE: Box constituting vacuum insulated walls of a refrigerator or freezer cabinet The following statement is a full description of this of performing it known to me/us:invention, including the best method Ii fr p ii Ii P:\OPER\SEW\79019-94.225 -12/8/96 j 1A- The present invention relates to a box constituting heat insulating walls of a refrigerator or freezer cabinet wherein the walls are formed by an inner shell of metal, an outer shell of metal, and an evacuated heat insulation between the shells, wherein the shells, at a rectangular access opening to the box, have edges which are gas-imperviously connected to each other by a thin metal strip having poor heat conductivity.
A box of this type is shown in U.S. Patent No. 2,164,143. The '143 box provides heat insulation consisting of a powder which is under vacuum. A strip, which prevents air from entering the insulation while also preventing heat from being conducted from the outer shell to the inner shell, has a bent cross-section. As a consequence of the bent shape of the strip, the joints of the strip at the corners of the access opening are bent. Because of the bent shape, the joints are complicated to make.
An object of preferred embodiments of the present invention is to bring about a I :connection between the edges of the inner and outer shells of a box which is easy to Smanufacture.
According to the present invention, there is provided a box forming heat insulating walls of a refrigerator or freezer cabinet, said walls comprising an inner metal shell, an outer metal shell, and an evacuated heat insulation between the shells, said shells having edges which surround a rectangular access opening to the box and which are gas-imperviously connected to each other by a thin metal strip having poor heat conductivity, wherein the edges 20 are folded towards each other so that they form planar surfaces located in substantially one and the same plane, and crevices, which occur after the folding at corners between adjoining I surfaces, are filled by weld material or weld-on plate pieces and made even or flat so that a good backing surface for the strips is obtained at the corners, and wherein the strip is j generally flat and soldered to the planar surfaces and to said backing surface at the corners. 4 In accordance with preferred embodiments of the present invention, edges of the inner I and outer shells are folded towards each other so that they form planar surfaces located in i substantially one and the same plane. A strip is soldered to the planar surfaces, GB Patent No. 1,061,204, has proposed to bridge an edge surrounding a f L r- js
F
-2plane vacuum insulated panel by soldering on thin strips of a poor heat conducting material. The strip, which is broader than the panel, is folded over the panel and is soldered to the panel with its folded part. This method of folding and fastening the strip to the panel is, however, not suitable for bridging the edge around an access opening o~f a box, and is especially not suitable at the corners of the access opening.
44 4 The preferred embodiment of a box according to the present invention is described below with reference to the attached drawings, wherein; FIG. 1 is a front elevational view of a box looking into an access opening; FIG. 2 is a cross-sectional view of the box as viewed from line 11-11 of FIG. 1, with the box located on a fixture; FIG. 3 is a front e2.evational view of the box similar to FIG. 1, but showing strips soldered on around the access opening; FIG. 4 shows an enlargement of the upper left corner of the box shown in FIG. 3; FIG. 5 is a cross-sectional view as seen from line V-V of FIG. 4; and FIG. 6 is a perspective view of a refrigerator or freezer cabinet, of which the box is a part.
It ii if
I
&9K r0 'er)4U -3- 2 With reference to FIG. 1, a box 10 according to the 3 present invention is shown to include an inner shell 12 and 4 an outer shell 14. The inner and outer shells 3-2, 14 are preferably formed from plate iron having a thickness of about 6 0.6 MM. At a rectangular access opening 16 to the box 101 7 edges of the shells 12, 14 are folded towards each other go a that they form planar surfaces 18, 18'. Pref erably, the 9 planar surfaces I.8, 1.8' are located in one and the same plane, are co-planar with one another.
11. In FIG. 2 the shells 12, 14 are shown placed on a f ixture 12 20 which keeps the surfaces 18, 18' mutually fixed when a 14 theaccess opening 16, is soldered to the surfaces 18, 18'.
5 Thesolder is preferably melted in inductive way by means of 16 twocoils 25 which heat the shells 122 14 which, in turn, heat 17 andmelt the solder. In order that the heat loss or is conduction through the strip 22 is as small as possible, a 19 srip22 is chosen which is as thin as possible and made from amaterial which conducts heat poorly. Preferably, the strip 21 2 isformed out of stainless steel and has a thickness of 22 0.05 mm.
23 FIG. 3 shows how the gap 24 has been sealed by four 24 straight strips 22 which overlap each other at the corners 26 of the access opening 16. Such a corner 26 is shown in 26: enlargement in FIGS. 4 and 5. The solder also connects the 27 strips 22 mutually at the corners 26, where they overlap each 28 other. The surfaces 18, 18' are suitably constituted by a 29 part of the respective shell folded 900. Crevices, which occur after the folding at corners 19, 19' between adjoining 31 surfaces 18, 18' are filled before the strips 22 are soldered 32 on by weld material or welded-on plate pieces and are made 33 even or flat so that a good backing surface for the strips 22 34 is obtained at the corners 19, 19'.
7 Al- Of 2 surfaces 18, 18' around the access opening 16 and have been 3 soldered mutually together at the corners 26, the space 4 between the shells 12, 14 is filled with a heat insulating powder 28, after which the space is evacuated and sealed (FIG.
6 With reference to FIG. 6, a plastic frame 30 is fastened 7 over or on the outside of the strips 22 to protect the strips 8 against mechanical damage. The box 10 is equipped with a door 9 32 and a refrigerating apparatus (not shown) and is, after surface conditioning, ready to be used as a refrigerator or 11 freezer 33. The door 32 is journalled in arms 34, which are 12 fastened to the shell 14. A seal 36, which is fastened to the 13 door 32, seals against the frame 30 when the door is closed.
14 The box 10 with the door 32 and the refrigerating apparatus 15 can also be used as a refrigerator or freezer box with the 16 access opening located in a horizontal plane. Furthermore, 17 the box 10 with the door 32 can be used without a S 18 refrigerating apparatus as a heat insulating cabinet.
19 The door 32 can consist of an element with one iron plate forming the outside and edges of the door and one iron plate 21 forming the inside of the door, which plates enclose an 22 evacuated heat insulation. A gap runs between the plates 23 around the inside of the door close to its periphery.
24 Adjacent to the gap, the plates show plane surfaces located in one and the same plane like the surfaces 18. Heat is S 26 prevented from being conducted through the plates from the o 27 outside to the inside of the door by thin metal strips, which j 28 in the same way as the strips 22, bridge the gap and are 29 soldered to the surfaces. Although the preferred embodiment of the present 31 invention is particularly and specifically described in the 32 foregoing, it should be clear that the present invention is 33 capable of various modifications, rearrangements, and 34 substitutions of parts without departing from the scope and spirit of the invention as defined by the claims appended 36 hereto. i I' 1 Ir U

Claims (4)

1. A box forming heat insulating walls of a refrigerator or freezer cabinet, said walls comprising an inner metal shell, an outer metal shell, and an evacuated heat insulation between the shells, said shells having edges which surround a rectangular access opening to the box and which are gas-imperviously connected to each other by a thin metal strip having poor heat conductivity, wherein the edges are folded towards each other so that they form planar surfaces located in substantially one and the same plane, and crevices, which occur after the folding at corners between adjoining surfaces, are filled by weld material or weld-on plate pieces and made even or flat so that a good backing surface for the strips is obtained at the corners, and wherein the strip is generally flat and soldered to the planar surfaces and to said backing surface at the corners. r t C I t S'
2. A box according to claim 1, wherein a plurality of strips connect the planar surfaces 4 15 together, two of said strips overlapping each other and being soldered to each other and to the Ssurfaces.
3. A box according to claim 2, wherein said two strips overlap each other and are soldered to each other and to the surfaces at a corner of the access opening. S:
4. A box forming insulating walls of a refrigerator or freezer cabinet substantially as hereinbefore described with reference to the accompanying drawings. |DATED this 12th day of August, 1996 Aktiebolaget Electrolux By DAVIES COLLISON CAVE Patent Attorneys for the Applicant(s) TO/ ~1 .1 1 BOX CONSTITUTING VACUUM INSULATED WALLS OP A REFRIGERATOR OR FREEZER CABINET ABSTRACT OF THE DISCLOSURE A box constituting heat insulating walls of a refrigerator or freezer cabinet, wherein the walls are formed by an inner shell of metal, an outer shell of metal, and an evacuated heat insulation. between the shells. The shells provide edges which surround a rectangular access opening to the box and which are folded towards each other so that they form planar surfaces located in substantially the same plane. The planar surfaces are gas-imperviously connected to each other by a thin metal strip having poor heat conductivity. The strip is soldered to the planar surfaces. C C C 4t 4 a I S I C I. I I IC,, I 1 C I. C S.C. 'CC. 4~ C C 4' if
AU79019/94A 1993-12-22 1994-11-24 Box constituting vacuum insulated walls of a refrigerator or freezer cabinet Ceased AU672728B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9304248A SE505193C2 (en) 1993-12-22 1993-12-22 Box comprising vacuum-insulated walls of a refrigerator or freezer
SE9304248 1993-12-22

Publications (2)

Publication Number Publication Date
AU7901994A AU7901994A (en) 1995-06-29
AU672728B2 true AU672728B2 (en) 1996-10-10

Family

ID=20392180

Family Applications (1)

Application Number Title Priority Date Filing Date
AU79019/94A Ceased AU672728B2 (en) 1993-12-22 1994-11-24 Box constituting vacuum insulated walls of a refrigerator or freezer cabinet

Country Status (9)

Country Link
US (1) US5586680A (en)
EP (1) EP0660057B1 (en)
JP (1) JPH07229673A (en)
AU (1) AU672728B2 (en)
DE (1) DE69408521T2 (en)
DK (1) DK0660057T3 (en)
ES (1) ES2114159T3 (en)
NZ (1) NZ270003A (en)
SE (1) SE505193C2 (en)

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DE19745827A1 (en) * 1997-10-16 1999-05-06 Bosch Siemens Hausgeraete Insulating wall
DE19745825A1 (en) * 1997-10-16 1999-04-22 Bosch Siemens Hausgeraete Thermally insulated cavity-walled case for e.g. Refrigerator
DE19745826A1 (en) * 1997-10-16 1999-04-22 Bosch Siemens Hausgeraete Heat insulated housing for domestic refrigeration appliance
CA2235997C (en) * 1998-04-27 2001-12-04 Michael Murden Van liner
EP1415116A1 (en) * 2001-08-01 2004-05-06 Jimpa, Inc. Appliance having shelving
DE60234673D1 (en) * 2002-02-26 2010-01-21 Whirlpool Co Vacuum-insulated refrigerator with modular frame and plate structure
US8986483B2 (en) 2012-04-02 2015-03-24 Whirlpool Corporation Method of making a folded vacuum insulated structure
US9182158B2 (en) 2013-03-15 2015-11-10 Whirlpool Corporation Dual cooling systems to minimize off-cycle migration loss in refrigerators with a vacuum insulated structure
US9221210B2 (en) 2012-04-11 2015-12-29 Whirlpool Corporation Method to create vacuum insulated cabinets for refrigerators
US9272475B2 (en) 2013-06-03 2016-03-01 Sonoco Development, Inc. Thermally insulated VIP sandwich shipper and method of making same
US9022249B2 (en) 2013-06-17 2015-05-05 Sonocco Development, Inc. Thermally insulated polyurethane shipper and method of making same
US9689604B2 (en) 2014-02-24 2017-06-27 Whirlpool Corporation Multi-section core vacuum insulation panels with hybrid barrier film envelope
US10052819B2 (en) 2014-02-24 2018-08-21 Whirlpool Corporation Vacuum packaged 3D vacuum insulated door structure and method therefor using a tooling fixture
US9599392B2 (en) 2014-02-24 2017-03-21 Whirlpool Corporation Folding approach to create a 3D vacuum insulated door from 2D flat vacuum insulation panels
US9476633B2 (en) 2015-03-02 2016-10-25 Whirlpool Corporation 3D vacuum panel and a folding approach to create the 3D vacuum panel from a 2D vacuum panel of non-uniform thickness
US10161669B2 (en) 2015-03-05 2018-12-25 Whirlpool Corporation Attachment arrangement for vacuum insulated door
US9897370B2 (en) 2015-03-11 2018-02-20 Whirlpool Corporation Self-contained pantry box system for insertion into an appliance
US9441779B1 (en) 2015-07-01 2016-09-13 Whirlpool Corporation Split hybrid insulation structure for an appliance
US11052579B2 (en) 2015-12-08 2021-07-06 Whirlpool Corporation Method for preparing a densified insulation material for use in appliance insulated structure
US10429125B2 (en) 2015-12-08 2019-10-01 Whirlpool Corporation Insulation structure for an appliance having a uniformly mixed multi-component insulation material, and a method for even distribution of material combinations therein
US10222116B2 (en) 2015-12-08 2019-03-05 Whirlpool Corporation Method and apparatus for forming a vacuum insulated structure for an appliance having a pressing mechanism incorporated within an insulation delivery system
US10422573B2 (en) 2015-12-08 2019-09-24 Whirlpool Corporation Insulation structure for an appliance having a uniformly mixed multi-component insulation material, and a method for even distribution of material combinations therein
US10041724B2 (en) 2015-12-08 2018-08-07 Whirlpool Corporation Methods for dispensing and compacting insulation materials into a vacuum sealed structure
US10422569B2 (en) 2015-12-21 2019-09-24 Whirlpool Corporation Vacuum insulated door construction
US9840042B2 (en) 2015-12-22 2017-12-12 Whirlpool Corporation Adhesively secured vacuum insulated panels for refrigerators
US9752818B2 (en) 2015-12-22 2017-09-05 Whirlpool Corporation Umbilical for pass through in vacuum insulated refrigerator structures
US10018406B2 (en) 2015-12-28 2018-07-10 Whirlpool Corporation Multi-layer gas barrier materials for vacuum insulated structure
US10610985B2 (en) 2015-12-28 2020-04-07 Whirlpool Corporation Multilayer barrier materials with PVD or plasma coating for vacuum insulated structure
US10807298B2 (en) 2015-12-29 2020-10-20 Whirlpool Corporation Molded gas barrier parts for vacuum insulated structure
US10030905B2 (en) 2015-12-29 2018-07-24 Whirlpool Corporation Method of fabricating a vacuum insulated appliance structure
US11247369B2 (en) 2015-12-30 2022-02-15 Whirlpool Corporation Method of fabricating 3D vacuum insulated refrigerator structure having core material
US10712080B2 (en) 2016-04-15 2020-07-14 Whirlpool Corporation Vacuum insulated refrigerator cabinet
EP3443284B1 (en) 2016-04-15 2020-11-18 Whirlpool Corporation Vacuum insulated refrigerator structure with three dimensional characteristics
US11320193B2 (en) 2016-07-26 2022-05-03 Whirlpool Corporation Vacuum insulated structure trim breaker
WO2018034665A1 (en) 2016-08-18 2018-02-22 Whirlpool Corporation Machine compartment for a vacuum insulated structure
WO2018070996A1 (en) 2016-10-11 2018-04-19 Whirlpool Corporation Structural cabinet for an appliance incorporating unitary metallic boxes
US10598424B2 (en) 2016-12-02 2020-03-24 Whirlpool Corporation Hinge support assembly
WO2018136054A1 (en) 2017-01-18 2018-07-26 Whirlpool Corporation Use of rigid or permeable conduits for achieving faster vacuum evacuation time in vacuum insulated structures
WO2018136053A1 (en) * 2017-01-18 2018-07-26 Whirlpool Corporation Increased vacuum port area for achieving faster vacuum evacuation time in vacuum insulated structures
EP3571453B1 (en) 2017-01-18 2023-05-24 Whirlpool Corporation Use of edge located channels for achieving faster vacuum evacuation time in vacuum insulated structures
US10907888B2 (en) 2018-06-25 2021-02-02 Whirlpool Corporation Hybrid pigmented hot stitched color liner system
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EP0260699A2 (en) * 1986-09-18 1988-03-23 ZELTRON - Istituto Zanussi per la Ricerca S.p.A. Method for manufacturing refrigerating apparatus

Also Published As

Publication number Publication date
SE9304248L (en) 1995-06-23
SE9304248D0 (en) 1993-12-22
EP0660057B1 (en) 1998-02-11
SE505193C2 (en) 1997-07-14
EP0660057A1 (en) 1995-06-28
DE69408521T2 (en) 1998-08-06
ES2114159T3 (en) 1998-05-16
NZ270003A (en) 1995-08-28
JPH07229673A (en) 1995-08-29
DE69408521D1 (en) 1998-03-19
US5586680A (en) 1996-12-24
DK0660057T3 (en) 1998-09-23
AU7901994A (en) 1995-06-29

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MK14 Patent ceased section 143(a) (annual fees not paid) or expired